I can usualy remember helpers names. I try and get an anchor, as others have said.
A good example, at the last Karnival, i had a lady come up and help. i asked her the name, and she said Hillary.
I forgot it straight away, because i commited the sin of not looking at her when she answered.
however, i asked her again later on... and when she said hillary, i looked at her chest and thought "Hills.... how can i forget"
not that her chest was particually hilly.. it just gave me that ade memoir.
If you watch Paul Daniels, he will often make a small joke about some peoples name. This was his way of remembering.
I remember one he did for a lady called Pat..." dont ever wear a tee shirt with your name across the front"..

Remember their name once, when they tell you it. Then if it suits your style refer to them as my love, or my friend, ect. Most of the time in day to day conversation, you dont refer to people by their name .
you're like Yoda.you dont say much, but what you do say is worth listening to....
Greg Wilson about.... Me.